package com.jiekou;

import java.util.function.DoubleToIntFunction;

public class phone implements usb {
    public void sj(){
        System.out.println("手机以死机");
    }
    @Override
    public void start() {
        System.out.println("phone开始工作");
    }

    @Override
    public void stop() {
        System.out.println("phone停止工作");
    }
}
